Polygenic & Multiple alleles

What are multiple alleles?

• Different forms of a gene found at the same location

• A single gene with only two possible forms

• Traits influenced by many genes

• Genes that are always dominant

In polygenic inheritance, traits are determined by:

• A single gene with two alleles

• Multiple genes working together

• Environmental factors only

• Mutations in DNA

Which of the following is an example of an acquired trait?

• Eye color

• Height

• Musical ability learned from practice

• Blood type

Which example best describes incomplete dominance?

• humans with blood type AB

• flowers with red petals

• horses with roan color pattern

• sheep with gray fleece

Multiple alleles mean that more than two versions of a gene can exist.

• True

• False

Acquired traits are inherited from parents.

• True

• False

Polygenic inheritance results in a wide range of phenotypes for a given trait.

• True

• False

An example of a trait controlled by multiple alleles is __________.

Traits that are influenced by several genes, such as skin color and height, are known as __________ inheritance.

__________ traits are characteristics that result from environmental influences and personal experiences.